package offer;

/**
 * @author cyt
 * @create 2020-05-19 17:26
 */
public class T7 {

    public static void main(String[] args) {


    }

    int fi(int a){

        if(a == 0) return 0;
        if(a == 1) return 1;

        else {

            return fi(a-1)+fi(a-2);
        }
    }
}
